1 //===- HashTable.h - PDB Hash Table -----------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef LLVM_DEBUGINFO_PDB_NATIVE_HASHTABLE_H
11 #define LLVM_DEBUGINFO_PDB_NATIVE_HASHTABLE_H
13 #include "llvm/ADT/SparseBitVector.h"
14 #include "llvm/ADT/iterator.h"
15 #include "llvm/Support/Endian.h"
16 #include "llvm/Support/Error.h"
24 class BinaryStreamReader;
25 class BinaryStreamWriter;
29 class HashTableIterator;
32 friend class HashTableIterator;
35 support::ulittle32_t Size;
36 support::ulittle32_t Capacity;
39 using BucketList = std::vector<std::pair<uint32_t, uint32_t>>;
43 explicit HashTable(uint32_t Capacity);
45 Error load(BinaryStreamReader &Stream);
47 uint32_t calculateSerializedLength() const;
48 Error commit(BinaryStreamWriter &Writer) const;
52 uint32_t capacity() const;
53 uint32_t size() const;
55 HashTableIterator begin() const;
56 HashTableIterator end() const;
57 HashTableIterator find(uint32_t K);
59 void set(uint32_t K, uint32_t V);
60 void remove(uint32_t K);
61 uint32_t get(uint32_t K);
64 bool isPresent(uint32_t K) const { return Present.test(K); }
65 bool isDeleted(uint32_t K) const { return Deleted.test(K); }
68 mutable SparseBitVector<> Present;
69 mutable SparseBitVector<> Deleted;
72 static uint32_t maxLoad(uint32_t capacity);
75 static Error readSparseBitVector(BinaryStreamReader &Stream,
76 SparseBitVector<> &V);
77 static Error writeSparseBitVector(BinaryStreamWriter &Writer,
78 SparseBitVector<> &Vec);
81 class HashTableIterator
82 : public iterator_facade_base<HashTableIterator, std::forward_iterator_tag,
83 std::pair<uint32_t, uint32_t>> {
84 friend class HashTable;
86 HashTableIterator(const HashTable &Map, uint32_t Index, bool IsEnd);
89 HashTableIterator(const HashTable &Map);
91 HashTableIterator &operator=(const HashTableIterator &R);
92 bool operator==(const HashTableIterator &R) const;
93 const std::pair<uint32_t, uint32_t> &operator*() const;
94 HashTableIterator &operator++();
97 bool isEnd() const { return IsEnd; }
98 uint32_t index() const { return Index; }
100 const HashTable *Map;
105 } // end namespace pdb
107 } // end namespace llvm
109 #endif // LLVM_DEBUGINFO_PDB_NATIVE_HASHTABLE_H